From 8b39e84ec10f5ae4a3f6475ec2e7cef63796c566 Mon Sep 17 00:00:00 2001
From: Damian Dabrowski <damian.dabrowski@cleura.com>
Date: Mon, 17 Apr 2023 17:01:41 +0200
Subject: [PATCH] Add TLS support to blazar backends

By overriding the variable `blazar_backend_ssl: True` HTTPS will
be enabled, disabling HTTP support on the blazar backend api.

The ansible-role-pki is used to generate the required TLS
certificates if this functionality is enabled.

Depends-On: https://review.opendev.org/c/openstack/openstack-ansible/+/879085
Change-Id: Ic784cb180ff4cbc81c230b0a3a62015a71ea3f99
---
 defaults/main.yml | 52 +++++++++++++++++++++++++++++++++++++++++++++++
 handlers/main.yml |  1 +
 tasks/main.yml    | 20 ++++++++++++++++++
 3 files changed, 73 insertions(+)

diff --git a/defaults/main.yml b/defaults/main.yml
index 64955e7..5a18eb2 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -100,6 +100,7 @@ blazar_services:
     uwsgi_port: "{{ blazar_service_port }}"
     uwsgi_bind_address: "{{ blazar_bind_address }}"
     uwsgi_overrides: "{{ blazar_api_uwsgi_ini_overrides }}"
+    uwsgi_tls: "{{ blazar_backend_ssl | ternary(blazar_uwsgi_tls, {}) }}"
   blazar-manager:
     group: blazar_all
     service_name: blazar-manager
@@ -112,6 +113,9 @@ blazar_wsgi_processes_max: 16
 blazar_wsgi_processes: "{{ [[(ansible_facts['processor_vcpus']//ansible_facts['processor_threads_per_core'])|default(1), 1] | max * 2, blazar_wsgi_processes_max] | min }}"
 blazar_wsgi_threads: 1
 blazar_wsgi_buffer_size: 65535
+blazar_uwsgi_tls:
+  crt: "{{ blazar_ssl_cert }}"
+  key: "{{ blazar_ssl_key }}"
 
 ## Keystone
 blazar_service_project_domain_id: default
@@ -167,3 +171,51 @@ blazar_blazar_conf_overrides: {}
 blazar_api_init_config_overrides: {}
 blazar_manager_init_config_overrides: {}
 blazar_api_uwsgi_ini_overrides: {}
+
+###
+### Backend TLS
+###
+
+# Define if communication between haproxy and service backends should be
+# encrypted with TLS.
+blazar_backend_ssl: "{{ openstack_service_backend_ssl | default(False) }}"
+
+# Storage location for SSL certificate authority
+blazar_pki_dir: "{{ openstack_pki_dir | default('/etc/openstack_deploy/pki') }}"
+
+# Delegated host for operating the certificate authority
+blazar_pki_setup_host: "{{ openstack_pki_setup_host | default('localhost') }}"
+
+# blazar server certificate
+blazar_pki_keys_path: "{{ blazar_pki_dir ~ '/certs/private/' }}"
+blazar_pki_certs_path: "{{ blazar_pki_dir ~ '/certs/certs/' }}"
+blazar_pki_intermediate_cert_name: "{{ openstack_pki_service_intermediate_cert_name | default('ExampleCorpIntermediate') }}"
+blazar_pki_regen_cert: ''
+blazar_pki_san: "{{ openstack_pki_san | default('DNS:' ~ ansible_facts['hostname'] ~ ',IP:' ~ management_address) }}"
+blazar_pki_certificates:
+  - name: "blazar_{{ ansible_facts['hostname'] }}"
+    provider: ownca
+    cn: "{{ ansible_facts['hostname'] }}"
+    san: "{{ blazar_pki_san }}"
+    signed_by: "{{ blazar_pki_intermediate_cert_name }}"
+
+# blazar destination files for SSL certificates
+blazar_ssl_cert: /etc/blazar/blazar.pem
+blazar_ssl_key: /etc/blazar/blazar.key
+
+# Installation details for SSL certificates
+blazar_pki_install_certificates:
+  - src: "{{ blazar_user_ssl_cert | default(blazar_pki_certs_path ~ 'blazar_' ~ ansible_facts['hostname'] ~ '-chain.crt') }}"
+    dest: "{{ blazar_ssl_cert }}"
+    owner: "{{ blazar_system_user_name }}"
+    group: "{{ blazar_system_user_name }}"
+    mode: "0644"
+  - src: "{{ blazar_user_ssl_key | default(blazar_pki_keys_path ~ 'blazar_' ~ ansible_facts['hostname'] ~ '.key.pem') }}"
+    dest: "{{ blazar_ssl_key }}"
+    owner: "{{ blazar_system_user_name }}"
+    group: "{{ blazar_system_user_name }}"
+    mode: "0600"
+
+# Define user-provided SSL certificates
+#blazar_user_ssl_cert: <path to cert on ansible deployment host>
+#blazar_user_ssl_key: <path to cert on ansible deployment host>
diff --git a/handlers/main.yml b/handlers/main.yml
index 6fa6ad7..3fc5e36 100644
--- a/handlers/main.yml
+++ b/handlers/main.yml
@@ -24,3 +24,4 @@
   listen:
     - "venv changed"
     - "systemd service changed"
+    - "cert installed"
diff --git a/tasks/main.yml b/tasks/main.yml
index 30d6cc7..da0e166 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -76,6 +76,26 @@
   tags:
     - blazar-install
 
+- name: Create and install SSL certificates
+  include_role:
+    name: pki
+    tasks_from: main_certs.yml
+    apply:
+      tags:
+        - blazar-config
+        - pki
+  vars:
+    pki_setup_host: "{{ blazar_pki_setup_host }}"
+    pki_dir: "{{ blazar_pki_dir }}"
+    pki_create_certificates: "{{ blazar_user_ssl_cert is not defined and blazar_user_ssl_key is not defined }}"
+    pki_regen_cert: "{{ blazar_pki_regen_cert }}"
+    pki_certificates: "{{ blazar_pki_certificates }}"
+    pki_install_certificates: "{{ blazar_pki_install_certificates }}"
+  when:
+    - blazar_backend_ssl
+  tags:
+    - always
+
 - name: Install the python venv
   import_role:
     name: "python_venv_build"